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IFP-2000 Installation Manual
3-10
151430
1. Total does not include isolator devices or accessory bases.
2. If using 24 VDC aux power only. No standby or alarm current for battery calculation if using 24 VAC, 120 VAC or
240 VAC.
3. If using door holders, you do not need to consider door holder current for alarm/battery standby, because power is
removed during that time. However, during normal operation, door holders draw current and must be included in the
9.0A total current that can be drawn from the panel.
4. Use next size battery with capacity greater than required.
5. Maximum SBUS address capacity is 63 SBUS modules. The practical limit is determined by the amount of SBUS
bandwidth consumed by each SBUS module. See section 4.5.2
3.6.3
Maximum Battery Standby Load
Table 3-2 and Table 3-3 show the standby load calculations for the IFP-2000 based on 24 and
90 hours of standby. The standby load calculations of line D in the Current Draw Calculation
Worksheet (Table 3-1) must be less than the number shown in Table 3-2 and Table 3-3 for the
selected battery size, standby hour and alarm time. The numbers below have a built in 20%
derating factor for the battery amp hour capacity.
Table 3-3: Maximum Battery Standby Loads for 90 Hour Standby*
Note: *For FM installations only
3.7
Installation Tasks Overview
This section provides a chart listing tasks that need to be performed when installing the IFP-
2000 system. The chart is intended to be a handy way for you to make sure you have
completed all necessary tasks. Unless noted, these tasks do not have to be performed in the
Table 3-2: Maximum Battery Standby Loads for 24 Hour Standby
Rechargeable
Battery Size
24 hr Standby,
5 mins. Alarm
24 hr Standby,
15 min alarm
24 hr Standby,
20 min alarm
17AH
535 mA
473mA
442mA
18AH
569mA
506mA
475mA
24AH
769 mA
706mA
675mA
33AH
1.07A
1.01A
975mA
35AH
1.14A
1.07A
1.04A
40AH
1.30A
1.24A
1.21A
55AH
1.80A
1.74A
1.71A
Rechargeable
Battery Size
90 hr Standby,
5 min alarm
90 hr Standby,
15 min alarm
90 hr Standby,
20 min alarm
33 AH
N/A
N/A
N/A
40 AH
347mA
331mA
322mA
55 AH
480mA
464mA
456mA
Warning!
Silent Knight does not support the use of batteries smaller than those listed in Table 3-2 and Table 3-3. If you
use a battery too small for the installation, the system could overload the battery resulting in the installation
having less than the required 24 hours standby power. Use Table 3-2 and Table 3-3 to calculate the correct
battery amperes/hour rating needed for your installation. It is recommended that you replace batteries every
five years.
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